fix: improve doc link navigation and tree display

- Fix link resolution with proper relative/absolute path handling
- Improve link styling with underline decoration
- Hide leaf nodes from tree, only show directories
- Fix log file path for packaged app

docs/api/rhi/opengl/fence/get-current-value.md

@@ -0,0 +1,19 @@
+# OpenGLFence::GetCurrentValue
+
+```cpp
+uint64_t GetCurrentValue() const
+```
+
+获取栅栏的当前值。
+
+**返回：** `uint64_t` - 当前栅栏值
+
+**示例：**
+
+```cpp
+uint64_t current = fence.GetCurrentValue();
+```
+
+## 相关文档
+
+- [OpenGLFence](fence.md) - 返回类总览